/Engine/Plugins/NetcodeUnitTest/NetcodeUnitTest/Source/NetcodeUnitTest/Public/NUTUtil.h
For example: [2017.02.27-15.09.15:999][ 0][SpecialCategory]LogUnitTest: LogMessage
static void SpecialLog ( [FOutputDeviceFile](API\Runtime\Core\Misc\FOutputDeviceFile) * Ar, const TCHAR * SpecialCategory, const TCHAR * Data, [ELogVerbosity::Type](API\Runtime\Core\Logging\ELogVerbosity__Type) Verbosity, const [FName](API\Runtime\Core\UObject\FName) & Category )